Animal locomotion : or, walking, swimming, and flying, with a dissertation on aëronautics (1873)
Pettigrew, James Bell, 1834-1908 · London : Henry S. King · leaf 98
s the tail to be lashed freely about in a vertical direction. Compare with fig. 29, p. 65. — (After Dallas.) act upon the water laterally as in the fish. The tail of the bird, which is also compressed from above downwards, can be twisted obliquely, and when in this position may be made to perform… … Fig. 36. — The Seal (Phocafcetida, Mull.), adapted principally for water. The extremities are larger than in the porpoise and manatee. Compare with figs. 33 and 34, p. 73. — Original. \ form, however, and mode of progression (if the fact of its occasionally swimming on its back be taken into…
Aeronautics
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